coat of arms

I spotted this on the one of University buildings - coat of arms of my city - Wroclaw. Sure it was always there... but I've never noticed it. One of these small things we never see. And as Wiki said:
In the centre is the severed head of John the Baptist, the city's patron saint. The crowned lion rampant in the first (upper left) quarter represents the Kingdom of Bohemia, which Wrocław became part of upon the death of Duke Henry VI of Silesia in 1335. In the second (upper right) quarter there is the Silesian eagle which comes from the ruling Piast dynasty. The letter "W" in the third quarter stands for both Wratislavia, the Latin name of the city, and for the name of the legendary founder of the city Wrócisław (probably Duke Vratislaus I of Bohemia). In the fourth quarter there is John the Evangelist with halo and an overturned crown as pectorale.